How to select the capacitor and resistor value for Active low pass filter


Joined Aug 1, 2013
There is no single "standard" active filter circuit. Without getting into how many poles the filter is, there are

functions: high pass, low pass, bandpass, notch...
basic topologies: Butterworth, Cauer, Chebyshev (lotsa spellings for that one), Bessel...
implementations: Sallen-Key, state-variable, bi-quadratic, gryators...

and on and on. Wiki has a good starting page, but it goes on and on, and it does assume that you can handle some math. This is a large topic in EE.